One case of tachycardia-induced cardiomyopathy caused by right ventricular outflow tract-ventricular tachycardia

A 36-year-old woman has suffered from paroxysmal palpitations,chest tightness and shortness of breath for more than 10years.ECG showed broad QRS,ventricular tachycardia and atrioventricular separation.The ECG pointed to an origin in the right ventricular outflow tract.Echocardiography showed that the left ventricular end-diastolic diameter was 53mm and the ejection fraction was 40%.B type natriuretic peptide was 7 920pg/ml.A single radiofrequency application at the site of ectopy was immediately effective.Holter monitoring was normal after ablation.Final diagnosis was right ventricular outflow tract-ventricular tachycardia,tachycardia-induced cardiomyopathy.